static public void Decompress(Stream source, Stream target)
{
BinaryReaderEx reader = new BinaryReaderEx(source);
// unsure what this is- probably decompressed size
int decompressedSize = reader.ReadInt32S();
// read length
int length = reader.ReadInt32S();
// decompress
BemaniLZSS2.DecompressGCZ(source, target, length, decompressedSize);
}
public static bool DetectBemaniImage2DXAC(byte[] data)
{
if (data.Length < 8)
return false;
using (MemoryStream mem = new MemoryStream(data))
{
BinaryReaderEx reader = new BinaryReaderEx(mem);
mem.Position = 4;
int compressedSize = reader.ReadInt32S();
if (compressedSize != (mem.Length - 8))
return false;
}
return true;
}
public static BemaniIFS Read(Stream source)
{
BemaniIFS result = new BemaniIFS();
// read header
Header header = Header.Read(source);
byte[] propertyPageData = new byte[header.BodyStart - Header.Size];
source.Read(propertyPageData, 0, propertyPageData.Length);
// read property page
#if (false)
List<byte[]> dataList = new List<byte[]>();
BinaryReaderEx reader = new BinaryReaderEx(source);
BemaniIFS result = new BemaniIFS();
// header length is 0x28 bytes
reader.ReadInt32S(); // identifier
Int16 headerMetaLength = reader.ReadInt16S(); // header meta amount?
reader.ReadInt16S(); // bitwise xor 0xFFFF of previously read value
reader.ReadInt32S();
reader.ReadInt32S();
Int32 headerLength = reader.ReadInt32S();
reader.ReadInt32S();
for (int i = 1; i < headerMetaLength; i++)
{
reader.ReadInt32S();
reader.ReadInt32S();
}
Console.WriteLine("Header length: " + headerLength.ToString());
// read table A
Int32 tableALength = reader.ReadInt32S();
Console.WriteLine("Table A length: " + tableALength.ToString());
MemoryStream tableAMem = new MemoryStream(reader.ReadBytes(tableALength));
// read table B
Int32 tableBLength = reader.ReadInt32S();
Console.WriteLine("Table B length: " + tableBLength.ToString());
MemoryStream tableBMem = new MemoryStream(reader.ReadBytes(tableBLength));
// read padding
int headerPadding = headerLength - (0x10 + (headerMetaLength * 8) + 4 + tableALength + 4 + tableBLength);
if (headerPadding > 0)
reader.ReadBytes(headerPadding);
// a bit of a hack to get the info we need (it's probably not accurate)
BinaryReaderEx tableAReader = new BinaryReaderEx(tableAMem);
BinaryReaderEx tableBReader = new BinaryReaderEx(tableBMem);
tableAReader.BaseStream.Position = 0x18;
tableBReader.BaseStream.Position = 0x14;
int dataLength = tableBReader.ReadInt32S();
MemoryStream dataChunk = new MemoryStream(reader.ReadBytes(dataLength));
BinaryReaderEx dataReader = new BinaryReaderEx(dataChunk);
// process tables
int chunkIndex = 0;
bool processTable = true;
while (processTable)
{
Console.Write("A:" + Util.ConvertToHexString((int)tableAReader.BaseStream.Position, 8) + " B:" + Util.ConvertToHexString((int)tableBReader.BaseStream.Position, 8) + " ");
byte chunkType = tableAReader.ReadByte();
Console.Write("Op:" + Util.ConvertToHexString(chunkType, 2) + " ");
switch (chunkType)
{
case 0x06: // directory
{
byte subType = tableAReader.ReadByte();
switch (subType)
{
case 0x03:
tableAReader.ReadBytes(3);
break;
case 0x06:
break;
default:
break;
}
Int32 fileModified = tableBReader.ReadInt32S(); // modified date?
Console.WriteLine("*" + Util.ConvertToHexString(fileModified, 8));
}
continue;
case 0x1E: // file
tableAReader.ReadByte();
{
Int32 fileOffset = tableBReader.ReadInt32S(); // offset
Int32 fileLength = tableBReader.ReadInt32S(); // length
Int32 fileModified = tableBReader.ReadInt32S(); // modified date?
Console.WriteLine(Util.ConvertToHexString(fileOffset, 8) + ":" + Util.ConvertToHexString(fileLength, 8) + ", *" + Util.ConvertToHexString(fileModified, 8));
dataReader.BaseStream.Position = fileOffset;
dataList.Add(dataReader.ReadBytes(fileLength));
}
break;
case 0x94: // filename
Console.WriteLine("FileID: " + Util.ConvertToHexString(tableAReader.ReadInt32S(), 8));
continue;
case 0xFE: // end of entry
Console.WriteLine("End of entry.");
break;
case 0xFF: // end of list
processTable = false;
Console.WriteLine("End of list.");
continue;
default:
// for types we don't know, skip the whole line for now
Console.WriteLine("UNKNOWN.");
break;
}
while (chunkType != 0xFE)
{
chunkType = tableAReader.ReadByte();
}
chunkIndex++;
}
result.files = dataList;
#endif
return result;
}
public static Stat Read(Stream source)
{
BinaryReaderEx reader = new BinaryReaderEx(source);
Stat result = new Stat();
result.Offset = reader.ReadInt32S();
result.Length = reader.ReadInt32S();
result.TimeStamp = reader.ReadInt32S();
return result;
}
public static Header Read(Stream source)
{
BinaryReaderEx reader = new BinaryReaderEx(source);
Header result = new Header();
result.Unk00 = reader.ReadInt32S();
result.Unk04 = reader.ReadInt32S();
result.Unk08 = reader.ReadInt32S();
result.Unk0C = reader.ReadInt32S();
result.BodyStart = reader.ReadInt32S();
result.Unk14 = reader.ReadInt32S();
result.Unk18 = reader.ReadInt32S();
result.Unk1C = reader.ReadInt32S();
result.Unk20 = reader.ReadInt32S();
return result;
}
